Thermal spray coating impregnation -- Vacuum vs. high pressure/vacuum technique

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:160529

Gagnon, D M ^[1]; Blann, G A ^[2]

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1. General Electric Aircraft Engines, Lynn, MA (United States)
2. Buehler, Lake Bluff, IL (United States)

Successful development and application of reliable thermally sprayed coatings depends largely on strict process control as well as coating microstructural analysis. However, accurate microstructural analysis of these coatings is possible only if each preparation step is performed with the utmost care. The proper encapsulation of coatings reduces the possibility of improper preparation and coating evaluation. The impregnation of porous coatings (2--20%) using a castable epoxy in a vacuum is a method presently used by most coating laboratories. Improved methods were needed to produce total impregnation of castable epoxides throughout the entire coating thickness, particularly in thick thermal spray coatings. A Vacuum/High pressure method has been successfully developed that will accomplish this task. The results of this method using five different coatings are shown.

• OSTI ID: 160529
• Report Number(s): CONF-940684--; ISBN 0-87170-509-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CHROMIUM OXIDES
COBALT
COMPOSITE MATERIALS
CUTTING
DIAMONDS
ENCAPSULATION
EPOXIDES
EXPERIMENTAL DATA
IMPREGNATION
MICROSTRUCTURE
POLISHING
POROSITY
PRESSURE DEPENDENCE
SAMPLE PREPARATION
SPRAY COATING
TRIBALOY 800
TUNGSTEN CARBIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES